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3,677
RESULTS

Media Type
3,677
texts
Availability
3,677
Always Available
Year
161
1983
145
1982
48
1980
104
1979
162
1978
98
1977
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Topics & Subjects
3,677
system technical
3,487
bell system
674
technical journal
644
frequency
442
system
408
transmission
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Collection
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Language
3,677
English
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